So I've got a tournament coming up at the end of this week, but my board is in shambles right now. Currently, it's at:

4 Chalice
4 Tracker
3 Krosan Grip
1 Boseiju
2 Choke
1 Depths

I have almost no answer to combo, save for the Chalice, but I'm lucky if I open with it, and Spheres are almost impossible to come by in my area. Are there any small changes I could make on the fly in the next few days in hopes of having some answer to combo? The meta I'm going to is mostly fair decks, with some combo scattered throughout, primarily Elves, Burn, and maybe an ANT or two.